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Ip /� <br /> 2 �U • <br /> Washington State Energy C/�ode''Residential <br /> Prescriptive Energy Code Compliance for All Climate Zones in Washington <br /> N Single Family '' ew &Additions (effective February 1,2021) <br /> Table 406.3*'Energy Credits (Single Family) <br /> Option Description Credits: SF <br /> 1. EFFICIENT BUILDING ENVELOPE OPTIONS <br /> Only one option from Items 1.1 through 1.7 may be selected in this category. <br /> Compliance with the conductive UA targets is demonstrated using Section R402.1.4, Total UA alternative, where [1- <br /> (Proposed UA/Target UA)] >the required %UA reduction. <br /> 1,1 Prescriptive compliance is based on Table R402.1.1 with the following modifications: 0.5 <br /> Vertical fenestration U =0.24 <br /> 1 2 Prescriptive compliance is based on Table R402.1.1 with the following modifications: 1.0 <br /> Vertical fenestration U =0.20 <br /> Prescriptive compliance is based on Table R402.1,1 with the following modifications: <br /> Vertical fenestration U =0.28 <br /> Floor R-38 <br /> 1.3 Slab on grade R-10 perimeter and under entire slab below grade slab R-10 perimeter and 0.5 <br /> under entire slab or <br /> Compliance based on Section R402.1.4: Reduce the Total conductive UA by 5% <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> Vertical fenestration U =0.25 <br /> Wall R-21 plus R-4 ci <br /> Floor R-38 <br /> 1.4 Basement wall R-21 int plus R-5 ci 1.0 <br /> Slab on grade R-10 perimeter and under entire slab Below grade slab R-10 perimeter and <br /> under entire slab or <br /> Compliance based on Section R402.1.4: Reduce the Total conductive UA by 15% <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> Vertical fenestration U =0.22 <br /> Ceiling and single-rafter or joist-vaultedR-49 advanced <br /> Wood frame wall R-21 int plus R-12 ci Floor R-38 <br /> 1.5 Basement wall R-21 int plus R-12 ci 2.0 <br /> Slab on grade R-10 perimeter and under entire slab Below grade slab R-10 perimeter and <br /> under entire slab or <br /> 1 Compliance based on Section R402.1.4: Reduce the Total conductive UA by 30% <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> Vertical fenestration U =0.18 <br /> Ceiling and single-rafter or joist-vaultedR-60 advanced <br /> Wood frame wall R-21 int plus R-16 ci <br /> 1.6 Floor R-48 3.0 <br /> Basement wall R-21 int plus R-16 ci <br /> Slab on grade R-20 perimeter and under entire slab Below grade slab R-20 perimeter and <br /> under entire slab or <br /> Compliance based on Section R402.1.4: Reduce the Total conductive UA by 40%. <br /> Advanced framing and raised heel trusses or rafters <br /> Vertical Glazing U-0.28 <br /> 1.7 R-49 Advanced (U-0.020) as listed in Section A102.2.1, Ceilings below a vented attic and 0.5 <br /> R-49 vaulted ceilings with full height of uncompressed insulation extending over the wall <br /> top plate at the eaves. <br /> Prescriptive Path—Single Family 2018 Washington State Energy Code-R 4 ;.3 <br />